Coolant temperature sensor replacement

2007 HYUNDAI ACCENT
49,000 MILES • 4 CYL • 2WD • AUTOMATIC
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BOB2017
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  • 1 POST
My car was recently having issues with the fans staying on and decreased gas mileage. Check engine light also came on. After some research, the problem seemed to be the coolant temperature sensor, so a new sensor was bought and the old one was replaced.

The engine light has gone off, but shifting still seems to be strange as the transmission almost seems to slip as it was doing prior to the sensor change. Gas mileage also has not gotten better since the sensor was changed.

Any ideas as to what the problem could be? There are no other issues. No lights, no overheating. Nothing. Any help would be greatly appreciated. Thanks.
Apr 23, 2018 at 12:34 PM
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STRAILER
  • ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Hello,

Yes this sounds like you have a input shaft speed sensor go out which can cause the problem you have described.

Here is a video of the job being done:

https://youtu.be/f3bETtCIdxM

Here is the location for your car. Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
Apr 26, 2018 at 4:43 PM
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DICK31
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Where is the temperature sensor located on the engine ??????
Feb 10, 2021 at 9:28 AM (Merged)
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KASEKENNY
  • ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
It is very close to the thermostat which will be in the housing at the end of the large coolant hose.

I attached the info below of where it is and how to replace it.

Let us know if you have questions. Thanks
Feb 10, 2021 at 9:28 AM (Merged)
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